java - Undefined for type ArrayList - putting random object of arraylist into variable -

i attempting place randomly chosen object of arraylist variable in class constructor.

public wordstoguess randomword()     {         int index = randomgenerator.nextint(words.size());         wordstoguess chosenword = words.get(index);         return chosenword;     }  public model() throws ioexception     {         words = new arraylist<wordstoguess>();         chosenword = words.randomword();         randomgenerator = new random();         } 

i error saying "the method randomword() undefined type arraylist". have removed unnecessary code constructor.

chosenword = words.randomword(); 

should read:

chosenword = randomword(); 

randomword() not method of arraylist of class.